error: unreachable expression
  --> $DIR/expr_return_in_macro.rs:13:5
   |
LL |         return ()
   |         --------- any code following this expression is unreachable
...
LL |     return early_return!();
   |     ^^^^^^^^^^^^^^^^^^^^^^ unreachable expression
   |
note: the lint level is defined here
  --> $DIR/expr_return_in_macro.rs:4:9
   |
LL | #![deny(unreachable_code)]
   |         ^^^^^^^^^^^^^^^^

error: aborting due to previous error